What is this algebra supposed to do with other algebra on mars? (I need help on an equation)?

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What is this algebra supposed to do with other algebra on mars? (I need help on an equation)?

12-7(x-4)+x = -2

What is x?! And why?!

-Apples

2007-05-12 11:51:55 · 3 answers · asked by Ari 2 in Science & Mathematics ➔ Mathematics

3 answers

12-7x+28+x = -2
40-6x = -2
-6x = -42
x = 7

2007-05-12 11:57:57 · answer #1 · answered by tochau 5 · 0⤊ 1⤋

12 - 7(x-4) + x = -2
12 - 7x + 28 + x = -2
-6x + 40 = -2
-6x = -42
x = 7

2007-05-12 19:00:15 · answer #2 · answered by Philo 7 · 0⤊ 1⤋

12-7(x-4)+x = -2

First we will combine terms on each side of the equation
12-7x+28+x = -2
40 - 6x = -2

Now subtract 40 from both sides
-6x = -42

Multiply both sides by -1
6x = 42

Then x = 7
.

2007-05-12 19:01:28 · answer #3 · answered by Robert L 7 · 0⤊ 1⤋